Controlled atmosphere sterilization and fresh-keeping device

Abstract

The invention relates to an air-conditioning sterilization and fresh-keeping device which can be suitably mounted on a vehicle to form a vehicle-mounted air-conditioning sterilization and fresh-keeping device by arranging an equipment room and a closed air-conditioning room as well as arranging a ventilation system, an air-conditioning fresh-keeping system, a sterilization and fresh-keeping system, a temperature regulation and control system and a humidity regulation and control system, so that the device is convenient to move; the occupied space is reduced, the storage space is increased, and the cost is reduced; the device is suitable for storing and taking out agricultural products such as sweet potatoes in batches; the box body of the container is used as a carrier, and good air tightness can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of post-harvest storage and preservation of agricultural products, and particularly relates to a controlled atmosphere sterilization and preservation device. Background Art

[0002] Agricultural products require storage and transportation after harvest to maintain freshness. Sweet potatoes, for example, are highly seasonal, requiring a period of storage for freshly harvested sweet potatoes to undergo saccharification, converting some of the starch into sugar and dextrin, increasing sugar content and enhancing palatability. However, sweet potatoes have large, water-rich roots and delicate tissue, making them susceptible to mechanical damage from bumps and bumps. Furthermore, sweet potatoes can suffer accelerated nutritional loss and even mold and rot due to fluctuations in temperature, humidity, and oxygen concentration during storage. Statistics show that improper storage results in an estimated 15% annual loss of sweet potatoes, severely hindering the development of the sweet potato industry.

[0003] Furthermore, sweet potatoes are susceptible to various diseases during storage, such as black spot, soft rot, and root rot. These diseases not only affect the quality of the sweet potatoes but can also lead to serious economic losses. Studies have shown that the optimal controlled atmosphere storage conditions for sweet potatoes are 12°C, 5.0% CO2, 8.0% O2, and 90% relative humidity.

[0004] Most existing controlled atmosphere preservation devices for fruits and vegetables are fixed and bulky, which is not conducive to the storage and removal of sweet potatoes in batches; movable controlled atmosphere preservation containers are expensive, have complex components, are large in size, and have small storage space; and some controlled atmosphere preservation devices using containers as carriers cannot ensure good airtightness. Summary of the Invention

[0005] In response to at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide a controlled atmosphere sterilization and preservation device to solve the problems of existing movable controlled atmosphere preservation devices being high in cost, complex in components, and occupying a large space, resulting in a small storage space.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A controlled atmosphere sterilization and fresh-keeping device, comprising: The box is provided with an equipment room and a closed gas conditioning room; the equipment room is equipped with a central controller; The ventilation system includes a temperature and humidity detector and an exhaust manifold; the top wall of the air-conditioning room is paved with an air intake pipe and an exhaust pipe connected to the outside through the exhaust manifold assembly; the temperature and humidity detector is arranged in the air-conditioning room and connected to the central controller; The controlled atmosphere preservation system includes a gas analyzer, a carbon dioxide remover, a nitrogen generator, an ethylene remover, and a first pressure sensor arranged in the controlled atmosphere room, as well as a constant pressure safety valve and a gas balance bag arranged in the controlled atmosphere room and connected to the outside; the carbon dioxide remover, the nitrogen generator, and the ethylene remover are respectively provided with exhaust valves, and each exhaust valve and the gas analyzer are respectively connected to the central controller; The sterilization and preservation system includes an ozone generator arranged in the atmosphere-controlled room; the ozone generator is provided with an ozone sealing valve, and the ozone sealing valve is connected to the central controller; a temperature control system comprising a first condenser, an electronic expansion valve, a compressor, a four-way reversing valve, a gas-liquid separator and an outdoor fan arranged in the equipment room and connected to the central controller, and a two-way reversible axial flow fan, an evaporator, a temperature sensor, an air filter and a circulating water tank arranged in the air conditioning room; The humidity control system includes a dehumidification unit and a humidification unit; the dehumidification unit includes a solenoid valve arranged in the equipment room and a second condenser and an indoor fan arranged in the air conditioning room; the humidification unit includes a water film and a water distributor arranged in the air conditioning room; The outdoor fan is connected to the first condenser, the outlet pipe of the first condenser is connected to the inlet pipe of the evaporator through the electronic expansion valve, the suction pipe of the compressor is connected to the gas-liquid separator, and the exhaust pipes of the evaporator, the gas-liquid separator, the first condenser and the compressor are respectively connected to the four interfaces of the four-way reversing valve; The bidirectional reversible axial flow fan, the air filter and the evaporator are connected in sequence, the indoor fan is connected to the water film, and the water film, the second condenser, the evaporator, the circulating water tank and the water distributor are connected in sequence to form a circulation loop; All components in the temperature control system and the humidity control system are connected to the central controller.

[0007] Preferably, shelves are provided in the atmosphere-controlled room, and positioning pins are provided on the shelves; A ventilation gap is provided between the shelf and the side wall of the atmosphere-conditioning room.

[0008] Preferably, there are two shelves, and an aisle is provided between the two shelves; The shelf is provided with a storage plate, and the storage plate has at least two positioning holes, and the positioning holes are evenly arranged; the positioning pin includes a positioning screw and a positioning nut, and the positioning screw is provided as a head screw and is set in the positioning hole, and the screw head is provided above the storage plate; the positioning nut is screwed to the positioning screw and is provided below the storage plate.

[0009] Preferably, a partition is provided in the box body, and the interior of the box body is divided into the equipment room and the gas conditioning room by the partition; one end of the equipment room away from the gas conditioning room is set as an opening structure communicating with the outside world; An opening and closing door is provided on the side wall of the equipment room, and a touch screen is installed on the opening and closing door, and the touch screen is connected to the central controller; An energy storage box is installed in the box body, and a solar panel is laid on the top wall of the box body; the solar panel is connected to the energy storage box, and the solar panel and the energy storage box are respectively connected to the central controller.

[0010] Preferably, arc transition structures are provided between the internal side walls of the controlled atmosphere room and at the joints between the side walls and the top and bottom walls, and / or are filled with polyurethane, and / or are airtightly treated by gluing non-woven fabric with airtight adhesive; A door frame is provided at one end of the air conditioning room away from the equipment room, polyurethane and airtight glue are provided between the door frame and the side wall of the box body for airtight treatment, and an airtight door is installed in the door frame; a groove is provided on the side of the airtight door adjacent to the door frame, and an inflatable sealing strip is embedded in the groove; a second pressure sensor is installed in the door frame, the second pressure sensor is connected to the inflation and deflation control system, and the inflation and deflation control system is connected to the inflatable sealing strip; The airtight door is provided with an observation window, and the door frame is installed with an emergency door opening device.

[0011] Preferably, a filter plate is provided below the evaporator, the filter plate is mounted on a drainage trough, and the drainage trough is connected to the circulating water tank; A drainer is provided below the wet film and is connected to the circulating water tank.

[0012] Preferably, a water level detector is provided in the circulating water tank, and the water level detector is connected to the central controller; The circulating water tank is provided with a water inlet pipe and a drain pipe, and the water inlet pipe and the drain pipe are respectively connected to the central controller.

[0013] Preferably, the circulating water tank and the water distributor are connected via a water pump, and a temperature sensor and a first pressure sensor are also provided in the equipment room.

[0014] Preferably, a lighting system is provided in the atmosphere-controlled room, and the lighting system includes a lighting lamp; the lighting lamp is connected to the central controller.

[0015] Preferably, a monitoring system is provided in the atmosphere-controlled room, and the monitoring system includes a monitor; the monitor is connected to the central controller.

[0016] The present invention has the following advantages due to the adoption of the above technical solution: 1. The controlled atmosphere sterilization and preservation device provided by the present invention can solve the problems of existing movable controlled atmosphere sterilization and preservation devices, such as high cost, complex components, large equipment space occupation, and resulting small storage space; it is suitable for installation on a vehicle to form a vehicle-mounted controlled atmosphere sterilization and preservation device, which is easy to move; it helps to reduce occupied space, increase storage space, and reduce costs; it is suitable for batch storage and removal of agricultural products such as sweet potatoes; it is convenient to use the box body of a container as a carrier, and helps to ensure good airtightness.

[0017] 2. The modified atmosphere sterilization and preservation device provided by the present invention utilizes ozone as an effective sterilization method, playing an important role in preserving the freshness of agricultural products such as sweet potatoes during storage. It kills harmful pathogens on the surface of the sweet potatoes and within the storage area, reducing the incidence of disease. Furthermore, ozone decomposes harmful gases such as ethylene in the sweet potato storage environment, slowing the aging process. The decomposition process does not produce harmful substances, nor does it cause secondary pollution to the environment or the sweet potatoes. This is a highly efficient and environmentally friendly freshness preservation and sterilization technology.

[0018] 3. The controlled atmosphere sterilization and preservation device provided by the present invention can precisely regulate the gas composition and ratio in the storage environment while maintaining temperature and humidity during the controlled atmosphere storage of agricultural products. This can inhibit the physiological and biochemical processes of, for example, sweet potatoes and the activity of pathogenic microorganisms, thereby extending the storage time and improving the storage quality of the sweet potatoes. The controlled atmosphere storage conditions for sweet potatoes can be easily set to the optimal controlled atmosphere storage conditions, for example, a temperature of 12°C, a CO2 gas concentration of 5.0% by weight, an O2 gas concentration of 8.0% by weight, and a relative humidity of 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of a controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the shelf structure of the controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0022] Figure 4 The figure is a schematic diagram of the structure of the positioning screw and positioning nut of the controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the exhaust manifold structure of the controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0024] Figure 6 This is a system connection block diagram of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0025] Figure 7 The present invention provides a schematic diagram of a temperature control system and a humidity control system in an equipment room and a controlled atmosphere sterilization and fresh-keeping device according to an embodiment of the present invention.

[0026] Figure 8 It is a schematic diagram of a carbon dioxide removal device of a controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0027] Figure 9 It is a schematic diagram of a nitrogen generator of a controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0028] Figure 10 It is a schematic diagram of an ethylene removal device of a controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0029] Figure 11 Schematic diagram of a central controller of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0030] Figure 12 It is a schematic diagram of an ozone generator of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0031] Figure 13 It is a schematic diagram of an energy storage box of a controlled atmosphere sterilization and fresh-keeping device provided in one embodiment of the present invention.

[0032] Figure 14 It is a schematic diagram of a temperature control system of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0033] Figure 15 It is a schematic diagram of a humidity control system of a controlled atmosphere sterilization and preservation device provided in one embodiment of the present invention.

[0034] Markings in the accompanying drawings: 1. Equipment room, 2. Gas conditioning room, 3. Airtight door, 4. Observation window, 5. Door frame, 6. Second pressure sensor, 7. Emergency door opening device, 8. Shelf, 801. Storage board, 802. Positioning hole, 803. Positioning pin, 804. Positioning screw, 805. Positioning nut, 9. Solar panel, 10. Touch screen, 11. Opening and closing door, 12. Light, 13. Gas analyzer, 14. Temperature and humidity detector, 15. Monitor, 16. Exhaust manifold, 17. Aisle, 18. Inflatable sealing strip, 19. Constant pressure safety valve, 20. Gas balance bag, 21. Carbon dioxide removal machine, 22. Nitrogen generator, 23. Ethylene removal machine, 24. Central controller, 25. Ozone generator, 26. Bidirectional reversible axial flow fan, 27. Evaporator, 28. First condenser, 29. Temperature sensor, 30. First pressure sensor, 31. Electronic expansion valve, 32. Outdoor fan, 33. Second condenser, 34. Compressor, 35. Four-way reversing valve, 36. Gas-liquid separator, 37. Air filter, 38. Drain trough, 39. Circulating water tank, 40 Solenoid valve, 41. Indoor fan, 42. Wet film, 43. Water distributor, 44. Filter plate, 45. Drainer, 46. Water level detector, 47. Water inlet pipe, 48. Drain pipe, 49. Water pump, 50. Energy storage tank. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "backward", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The direction of the arrows in the figures represents the direction of liquid flow.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "assembly," "disposition," and "connection" should be understood broadly, and may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] The present invention provides a controlled atmosphere sterilization and fresh-keeping device. By setting up an equipment room and a closed controlled atmosphere room, and by setting up a ventilation system, a controlled atmosphere fresh-keeping system, a sterilization and fresh-keeping system, a temperature control system and a humidity control system, the device can be suitable for installation on a vehicle to form a vehicle-mounted controlled atmosphere sterilization and fresh-keeping device, which is convenient for moving. It is beneficial to reduce occupied space, increase storage space and reduce costs. It is suitable for batch storage and removal of agricultural products such as sweet potatoes. It is beneficial to use the box body of a container as a carrier, which is beneficial to ensuring good airtightness.

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] Example Please refer to Figure 1 、 Figure 2 and Figures 5 to 15The controlled atmosphere sterilization and fresh-keeping device provided in this embodiment includes a box, a ventilation system, a controlled atmosphere fresh-keeping system, a sterilization and fresh-keeping system, a temperature control system and a humidity control system; the box is provided with an equipment room 1 and a sealed controlled atmosphere room 2; the equipment room 1 is installed with a central controller 24; the ventilation system includes a temperature and humidity detector 14 and an exhaust manifold 16; the top wall of the controlled atmosphere room 2 is paved with an air inlet pipe and an exhaust pipe connected to the outside world through the exhaust manifold 16 assembly; the temperature and humidity detector 14 is arranged in the controlled atmosphere room 2 and is connected to the central controller 24; the controlled atmosphere fresh-keeping system includes a gas analyzer 13, a carbon dioxide remover 21, a nitrogen generator 21 and a gas analyzer 13 arranged in the controlled atmosphere room 2 The sterilization and preservation system includes an ozone generator 25 arranged in the gas conditioning room 2; the ozone generator 25 is provided with an ozone sealing valve, which is connected to the central controller 24; the temperature control system includes a first condenser 28, an electronic The expansion valve 31, the compressor 34, the four-way reversing valve 35, the gas-liquid separator 36 and the outdoor fan 32, as well as the two-way reversible axial flow fan 26, the evaporator 27, the temperature sensor 29, the air filter 37 and the circulating water tank 39 arranged in the air conditioning room 2; the humidity control system includes a dehumidification unit and a humidification unit; the dehumidification unit includes a solenoid valve 40 arranged in the equipment room 1 and a second condenser 33 and an indoor fan 41 arranged in the air conditioning room 2, and the humidification unit includes a water film 42 and a water distributor 43 arranged in the air conditioning room 2; the outdoor fan 32 is connected to the first condenser 28, and the outlet pipe of the first condenser 28 is connected to the first condenser 28. The electronic expansion valve 31 is connected to the inlet pipe of the evaporator 27, the intake pipe of the compressor 34 is connected to the gas-liquid separator 36, and the exhaust pipes of the evaporator 27, the gas-liquid separator 36, the first condenser 28 and the compressor 34 are respectively connected to the four interfaces of the four-way reversing valve 35; the bidirectional reversible axial flow fan 26, the air filter 37 and the evaporator 27 are connected in sequence, the indoor fan 41 is connected to the water film 42, the water film 42, the second condenser 33, the evaporator 27, the circulating water tank 39 and the water distributor 43 are connected in sequence to form a circulation loop; all components in the temperature control system and the humidity control system are connected to the central controller 24.

[0041] The atmosphere-controlled sterilization and preservation device provided in this embodiment, each component of the temperature control system and the humidity control system are connected to the central controller 24, specifically the first condenser 28, the electronic expansion valve 31, the compressor 34, the four-way reversing valve 35, the gas-liquid separator 36 and the outdoor fan 32, the two-way reversible axial flow fan 26, the evaporator 27, the temperature sensor 29, the air filter 37 and the circulating water tank 39, as well as the solenoid valve 40, the second condenser 33 and the indoor fan 41, the water film 42 and the water distributor 43 are all connected to the central controller 24.

[0042] Equipment Room 1 houses the temperature control system, humidity control system, ventilation system, sterilization and preservation system, and controlled atmosphere preservation system. Taking sweet potatoes as an example, controlled atmosphere room 2 is used for sweet potato storage. The temperature control system regulates the temperature within controlled atmosphere room 2, the humidity control system regulates the humidity within the room, the sterilization and preservation system sterilizes and preserves the sweet potatoes within the room, and the controlled atmosphere preservation system regulates the concentration of gas components within the sweet potato storage environment to extend the shelf life of the sweet potatoes.

[0043] The temperature and humidity detector 14 is used to detect the temperature and humidity in the atmosphere-conditioned room 2 and transmit them to the central controller 24 in real time. The gas analyzer 13 is used to detect the concentration of each gas component in the atmosphere-conditioned room 2 and transmit them to the central controller 24 in real time. The central controller 24 determines whether to regulate the temperature control system, humidity control system, sterilization and preservation system and atmosphere-conditioned preservation system based on the temperature, humidity and gas component concentration information in the atmosphere-conditioned room 2.

[0044] The central controller 24 collects and records real-time data from the gas analyzer 13, and controls the exhaust valves of the carbon dioxide remover 21, nitrogen generator 22, and ethylene remover 23 located inside the equipment room 1 to achieve the set concentrations of gas components such as carbon dioxide and oxygen, and remove the ethylene produced during the storage of sweet potatoes. The gas balance bag 20 and the constant pressure safety valve 19 are used to buffer the pressure imbalance of the gas-conditioning room 2 during the gas-conditioning process. When the pressure in the gas-conditioning room 2 is higher than the atmospheric pressure, the gas enters the gas balance bag 20 to balance the pressure in the gas-conditioning room 2. When the pressure in the gas-conditioning room 2 is lower than the atmospheric pressure, the gas in the gas balance bag 20 is automatically replenished into the gas-conditioning room 2. By changing the volume of the gas balance bag 20, the pressure difference in the gas-conditioning room 2 is reduced or eliminated to prevent the structure of the gas-conditioning room 2 from being deformed or damaged due to the pressure difference.

[0045] Ozone generator 25 can be connected to one end of the ozone air supply duct, and the other end of the ozone air supply duct can be connected to an ozone nozzle. When the ozone concentration is lower than a set value, all airtight valves are closed, and only the ozone airtight valve is opened, so that the air conditioning room 2 is in a closed state. According to the set ozone concentration and fumigation time, the central controller 24 controls the ozone generator 25 to start and produce ozone and send it into the ozone air supply duct, which is sprayed into the air conditioning room 2 inside by the ozone nozzle, so that the ozone diffusion speed in the air conditioning room 2 is faster and more evenly distributed. When the ozone concentration reaches the set value, the ozone airtight valve is closed, and the ozone generator stops running. The timing starts according to the preset fumigation time until the set time is reached, and the sterilization and fresh-keeping effect of ozone on the sweet potato is brought into play.

[0046] A temperature sensor 29 and a first pressure sensor 30 can also be installed in the equipment room 1. The temperature sensor 29 can be installed on the front side of the evaporator 27 and on the outlet pipe of the compressor 34. The pressure sensor 30 can be installed on the outlet pipe of the evaporator 27, the pipe connected to the D interface of the four-way valve, and the inlet pipe of the first condenser 28. The compressor 34 can be a vortex compressor. The evaporator 27 can be installed on the inside of the front wall of the air conditioning room 2 and can be close to the two-way reversible axial flow fan 26. An air filter 37 is installed between the evaporator 27 and the two-way reversible flow fan 26. The four-way valve 35 has four ports, typically labeled A, B, C, and D. Port D can be connected to the exhaust pipe of the compressor 34, port C to the first condenser 28, port A to the evaporator 27, and port B to the intake pipe of the compressor 34. An outdoor fan 32 is installed behind the first condenser 28. The outlet of the compressor 34 is connected to the inlet pipe of the first condenser 28, which is then connected to the inlet pipe of the evaporator 27 via an electronic expansion valve 31. When the temperature of the air-conditioning room 2 is higher than the set temperature, the compressor 34 starts. The low-temperature, low-pressure refrigerant gas is sucked into the compressor 34 and compressed into a high-temperature, high-pressure gas, which enters the four-way reversing valve 35. The four-way reversing valve 35 directs the refrigerant to the first condenser 28, and the outdoor fan 32 starts to accelerate the heat dissipation of the first condenser 28. The refrigerant condenses into a liquid in the first condenser 28. The condensed refrigerant passes through the electronic expansion valve 31 for throttling and pressure reduction, and becomes a low-temperature, low-pressure gas-liquid mixture, which enters the evaporator 27. The low-temperature, low-pressure refrigerant absorbs heat and vaporizes in the evaporator 27, absorbing heat in the air-conditioning room 2 and cooling the air. The cooled air is blown into the air-conditioning room 2 through the two-way reversible axial flow fan 26, thereby reducing the temperature of the internal cavity of the air-conditioning room 2.

[0047] A filter plate 44 can be installed below the evaporator 27 and mounted on a drain trough 38, which can be connected to a circulating water tank 39. A drainer 45 can be installed below the wet membrane 42 and connected to the circulating water tank 39. Condensate generated by the evaporator 27 can be collected in the drain trough 38, filtered, and then discharged into the circulating water tank 39. The refrigerant is converted into a low-temperature, low-pressure gas and returned through a pipeline to the gas-liquid separator 36. The separated gaseous refrigerant enters the compressor 34, completing the cycle. When the temperature of the air conditioning room 2 falls below the set temperature, the four-way reversing valve 35 switches the refrigerant flow direction. After being discharged from the compressor 34, the refrigerant passes through the four-way reversing valve 35 and enters the evaporator 27, absorbing heat from the air conditioning room 2 and heating the air. The heated air is blown into the air chamber 2 by the bidirectional reversible axial flow fan 26, raising the chamber temperature. After releasing heat in the evaporator 27, the refrigerant turns into a low-temperature, low-pressure gas, and flows back to the gas-liquid separator 36 through the pipeline. The separated gaseous refrigerant enters the compressor 34, completing the cycle.

[0048] The circulating water tank 39 is connected to the water distributor 43 via a water pump 49, which is in turn connected to the central controller 24. When the humidity in the air-conditioning room 2 exceeds a preset value, the solenoid valve 40 closes, de-energizing the first condenser 28. The bidirectional reversible axial flow fan 26 is activated, drawing moist air from the air-conditioning room 2. The moist air is filtered through the air purification filter 37 before entering the evaporator 27. The compressor 34 drives the evaporator 27 to cool the moist air, condensing the water vapor into water droplets, creating dry air. The dry air dissipates heat through the second condenser 33 and is blown out by the indoor fan 41, draining into the air-conditioning room 2. Condensed water from the evaporator 27 is collected in the drain trough 38, filtered through the filter plate 44, and then discharged into the circulating water tank 39 until the humidity in the air-conditioning room 2 drops to the set value. When the humidity in the air-conditioning room 2 falls below the set value, the water pump 49 is activated. The water pump 49 transports the water in the circulating water tank 39 to the water distributor 43 via the water conduit. Water seeps downward from the top of wet film 42, forming a uniform water film. Dry air comes into contact with wet film 42, becoming humidified through vaporization and evaporation. The humidified air is blown into the air conditioning room 2 via indoor fan 41. Water dripping from wet film 42 flows back through drainer 45 to the circulating water tank 39 until the humidity in the air conditioning room 2 reaches the set value.

[0049] An opening and closing door 11 may be provided on the side wall of the equipment room 1 , and a touch screen 10 may be installed on the opening and closing door 11 , which is connected to the central controller 24 .

[0050] A water level detector 46 can be installed in the circulating water tank 39. The water level detector 46 is connected to the central controller 24 and is used to detect the water level in the circulating water tank 39. The circulating water tank 39 is provided with an inlet pipe 47 and a drain pipe 48. The inlet pipe 47 and the drain pipe 48 can each be equipped with an intelligent valve connected to the central controller 24. The intelligent valves can be existing products. The central controller 24 controls the intelligent valves to control the water inflow and outflow of the circulating water tank 39. When the water level in the circulating water tank 39 falls below the set water level, the central controller 24 collects the signal and sends a prompt to the touch screen 10 or mobile terminal to add water. When the water level rises above the set water level, the central controller 24 sends a command to open the drain pipe 48 until the water level in the circulating water tank 39 returns to the set range.

[0051] The box body can be configured as a rectangular box body, which can be configured as a refrigerated truck container box body.

[0052] The bidirectional reversible axial flow fan 26, evaporator 27, first condenser 28, HEPA filter 37, drain tank 38, and circulating water tank 39 can be mounted on the inner wall of the equipment room 1. The electronic expansion valve 31, outdoor fan 32, scroll compressor 34, four-way reversing valve 35, and gas-liquid separator 36 can be mounted on the outer wall of the equipment room 1.

[0053] The second condenser 33 can be installed on the inner wall of the equipment room 1. The solenoid valve 40, indoor fan 41, wet film 42, water distributor 43, filter plate 44, drainer 45, water level detector 46, water inlet pipe 4, drain pipe 48, and water pump 49 can be installed on the inner wall of the air conditioning room 2. The water level detector 46 and water pump 49 can be installed inside the circulating water tank 39. The water inlet pipe 4 and drain pipe 48 are connected to the circulating water tank 39 and installed on the inner wall of the air conditioning room 2.

[0054] Specifically, a shelf 8 is provided in the atmosphere-controlled room 2 , and a positioning pin 803 is provided on the shelf 8 ; a ventilation gap is provided between the shelf 8 and the side wall of the atmosphere-controlled room 2 to facilitate gas circulation.

[0055] Please refer to Figure 3 and Figure 4 Specifically, two shelves 8 are provided, and an aisle 17 is provided between the two shelves 8; a storage plate 801 is provided on the shelf 8, and at least two positioning holes 802 are opened on the storage plate 801, and the positioning holes 802 are evenly arranged; the positioning pin 803 includes a positioning screw 804 and a positioning nut 805, and the positioning screw 804 is provided as a head screw and is set in the positioning hole 802, and the screw head is set above the storage plate 801; the positioning nut 805 is screwed with the positioning screw 804 and is provided below the storage plate 801.

[0056] Aisle 17 is used to facilitate staff inspection and transfer of agricultural products, such as sweet potatoes, placed on shelf 8. Agricultural products can be placed in a transfer frame. The transfer frame is placed on shelf 8. Positioning pins 803 restrict the movement of the transfer frame to prevent it from falling off shelf 8 during transfer. The transfer frame is placed between the screw heads of multiple positioning screws 804. The screw heads of the positioning screws 804, which are fixed around the transfer frame, prevent the transfer frame from falling off shelf 8.

[0057] Please refer to Figure 1 and Figure 6 Specifically, a partition can be set in the box, and the interior of the box is divided into an equipment room 1 and an air-conditioning room 2 by the partition; the end of the equipment room 1 away from the air-conditioning room 2 can be set as an open structure connected to the outside world; the box is installed with an energy storage box 50, and the top wall of the box is laid with a solar panel 9; the solar panel 9 is connected to the energy storage box 50, and the solar panel 9 and the energy storage box 50 are respectively connected to the central controller 24.

[0058] The central controller 24 can be installed in the air conditioning room 2, and the touch screen 10 can be installed on the outer surface of the opening and closing door 11. The energy storage box 50 can be installed in the equipment room 1.

[0059] Please refer to Figure 1 and Figure 2 The end of equipment room 1, away from the gas-conditioning room 2, is designed to be open, facilitating maintenance of the equipment within equipment room 1. The gas-conditioning room 2 is connected to equipment room 1 via an exhaust manifold 16 assembly. At least two exhaust manifolds 16 can be provided. A constant-pressure safety valve 19 is installed within equipment room 1, connecting the interior of gas-conditioning room 2 with equipment room 1. A gas balance bag 20 is installed at the top of gas-conditioning room 2, connecting the interior of gas-conditioning room 2 with equipment room 1.

[0060] The top wall and the outer side surfaces of the side walls of the box can be paved with foldable solar panels 9.

[0061] Please refer to Figure 1 and Figure 6 Specifically, arc transition structures are provided between the internal side walls of the atmosphere-controlled room 2 and at the connections between the side walls and the top and bottom walls, and / or they are filled with polyurethane respectively, and / or non-woven fabrics are glued with airtight glue for airtight treatment to ensure the sealing of the atmosphere-controlled room 2; a door frame 5 is provided at the end of the atmosphere-controlled room 2 away from the equipment room 1, polyurethane and airtight glue are provided between the door frame 5 and the side wall of the box for airtight treatment, and an airtight door 3 is installed in the door frame 5; a groove is provided on the side of the airtight door 3 adjacent to the door frame 5, and an inflatable sealing strip 18 is embedded in the groove; a second pressure sensor 6 is installed on the door frame 5, and the second pressure sensor 6 is connected to the inflation and deflation control system, and the inflation and deflation control system is connected to the inflatable sealing strip 18; an observation window 4 is provided on the airtight door 3, and an emergency door opening device 7 is installed on the door frame 5.

[0062] The second pressure sensor 6 is installed on the outside of the airtight door 3. When the airtight door 3 is not closed, the second pressure sensor 6 protrudes from the door frame 5. When the door is closed, the second pressure sensor 6 contacts the door frame 5 and is squeezed with the door frame 5, causing the second pressure sensor 6 to shrink until it is completely sunken and flush with the peripheral part of the door frame 5. The second pressure sensor 6 detects that the door 3 and the door frame 5 are in contact. At this time, the inflation and deflation control system controls the inflation sealing strip 18 to inflate and seal the airtight door 3 and the door frame 5. When the door is opened, the pressure sensor 6 is not subjected to pressure, that is, it detects that the opening and closing door 3 is separated from the door frame 5, and then returns to its original state of protruding from the door frame 5. At this time, the inflation and deflation control system controls the inflation sealing strip 18 to deflate and shrink into the groove around the door 3.

[0063] Among them, the air intake pipe and exhaust pipe of the exhaust manifold 16 assembly connected to the outside world can be equipped with closed valves. Before the sweet potatoes are put into the gas storage and conditioning room 2, the airtight door 3, the observation window 4, the constant pressure safety valve 19 and the closed valves of all pipes connecting the gas storage and conditioning room 2 should be closed first. The positive pressure test method is used to check the air tightness of the gas storage and conditioning room 2, so that the air tightness of the gas storage and conditioning room 2 should reach 300Pa, and the half-pressure reduction time should be no less than 20~30 minutes, for example, 30 minutes.

[0064] The air tightness of the air-conditioning room 2 should reach 300 Pa, which means that the value displayed by the air tightness tester is 300 Pa. The half-pressure reduction time is an indicator of the air tightness of the air-conditioning room 2. It refers to the time required for the internal and external pressure difference of the air-conditioning room 2 to be reduced by half.

[0065] Before transporting sweet potatoes into the atmosphere-controlled room 2, the airtight door 3 should be opened for ventilation. According to the real-time monitoring results of the gas analyzer 13, the transporters can only enter after the oxygen content rises to 20%.

[0066] The radius of the arc transition structure can be set to 30-50 mm, for example 50 mm. The airtight door 3 can be set to a single door.

[0067] Two grooves can be provided on the side surface of the airtight door 3 adjacent to the door frame 5 , thereby providing a double-layer inflatable sealing strip 18 .

[0068] The observation window 4 can be set as a double-layer hollow glass window for observing the storage conditions of the sweet potatoes in the atmosphere-controlled room 2.

[0069] Two emergency door opening devices 7 can be provided, one inside and one outside the door frame 5 of the air-conditioning room 2, respectively, to prevent accidents from happening.

[0070] The emergency door opening device 7 can be composed of a pull rod, a locking mechanism, and a transmission component. The pull rod can be set on the inner side of the airtight door 3 of the air-conditioning room 2. When the pull rod is pulled, the locking mechanism is driven by the transmission component to open the door. The emergency door opening device 7 can adopt an emergency door release device of a prior art product for quickly releasing the door lock in an emergency. The model can be EDR-1N, EDR-2N, or EDR-3N. Alternatively, the emergency door opening device model FG3-8 in the prior art can be adopted. This is a silent emergency door opening device suitable for quickly unlocking the air-conditioning room 2.

[0071] like Figure 2 As shown, specifically, a lighting system is provided in the gas-conditioned room 2 , and the lighting system includes a lighting lamp 12 ; the lighting system is connected to the central controller 24 , for example, the lighting lamp 12 is connected to the central controller 24 .

[0072] Specifically, a monitoring system is provided in the gas conditioning room 2 , and the monitoring system includes a monitor 15 ; the monitoring system is connected to the central controller 24 , for example, the monitor 15 is connected to the central controller 24 .

[0073] The central controller 24 can be connected to a mobile terminal. The lighting 12 and monitor 15 can be connected to an energy storage box 50, each powered by the energy storage box 50, or alternatively, connected to a separate power source. The monitor 15 can be mounted on the ceiling of the controlled atmosphere room 2 to monitor the storage status of the sweet potatoes within the room and transmit the information to the mobile terminal in real time. The lighting 12 can be mounted in the center of the ceiling of the controlled atmosphere room 2 for easy viewing by staff.

[0074] The central controller 24 can be connected to the energy storage box 50 and can be equipped with an independent switch. The central controller 24 can upload the operating status of each system in the controlled atmosphere sterilization and preservation device to the mobile terminal, so that the staff can understand the internal status of the controlled atmosphere sterilization and preservation device and make relevant adjustments accordingly.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A controlled atmosphere sterilization and preservation device, characterized in that: include: The box body is provided with an equipment room (1) and a sealed atmosphere-controlled room (2); the equipment room (1) is equipped with a central controller (24); A ventilation system comprising a temperature and humidity detector (14) and an exhaust manifold (16); an air inlet pipe and an exhaust pipe connected to the outside world are laid on the top wall of the air conditioning room (2) through the exhaust manifold (16) assembly; the temperature and humidity detector (14) is arranged in the air conditioning room (2) and is connected to the central controller (24); A controlled atmosphere preservation system comprises a gas analyzer (13), a carbon dioxide remover (21), a nitrogen generator (22), an ethylene remover (23), and a first pressure sensor (30) arranged in the controlled atmosphere room (2), as well as a constant pressure safety valve (19) and a gas balance bag (20) arranged in the controlled atmosphere room (2) and connected to the outside; the carbon dioxide remover (21), the nitrogen generator (22), and the ethylene remover (23) are respectively provided with exhaust valves, and each exhaust valve and the gas analyzer (13) are respectively connected to the central controller (24); The sterilization and fresh-keeping system comprises an ozone generator (25) arranged in the atmosphere-controlled room (2); the ozone generator (25) is provided with an ozone sealing valve, and the ozone sealing valve is connected to the central controller (24); A temperature control system comprising a first condenser (28), an electronic expansion valve (31), a compressor (34), a four-way reversing valve (35), a gas-liquid separator (36), and an outdoor fan (32) arranged in the equipment room (1) and connected to the central controller (24), and a two-way reversible axial flow fan (26), an evaporator (27), a temperature sensor (29), an air filter (37), and a circulating water tank (39) arranged in the air conditioning room (2); A humidity control system, comprising a dehumidification unit and a humidification unit; the dehumidification unit comprises a solenoid valve (40) arranged in the equipment room (1) and a second condenser (33) and an indoor fan (41) arranged in the air conditioning room (2); the humidification unit comprises a water film (42) and a water distributor (43) arranged in the air conditioning room (2); The outdoor fan (32) is connected to the first condenser (28), the outlet pipe of the first condenser (28) is connected to the inlet pipe of the evaporator (27) through the electronic expansion valve (31), the suction pipe of the compressor (34) is connected to the gas-liquid separator (36), and the exhaust pipes of the evaporator (27), the gas-liquid separator (36), the first condenser (28) and the compressor (34) are respectively connected to the four interfaces of the four-way reversing valve (35); The bidirectional reversible axial flow fan (26), the air filter (37) and the evaporator (27) are connected in sequence, the indoor fan (41) is connected to the water film (42), and the water film (42), the second condenser (33), the evaporator (27), the circulating water tank (39) and the water distributor (43) are connected in sequence to form a circulation loop; Each component in the temperature control system and the humidity control system is connected to the central controller (24).

2. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: A shelf (8) is provided in the atmosphere-controlled room (2), and a positioning pin (803) is provided on the shelf (8); A ventilation gap is provided between the shelf (8) and the side wall of the atmosphere-controlled room (2).

3. The controlled atmosphere sterilization and fresh-keeping device according to claim 2, characterized in that: There are two shelves (8), and an aisle (17) is provided between the two shelves (8); The shelf (8) is provided with a storage plate (801), the storage plate (801) is provided with at least two positioning holes (802), and the positioning holes (802) are evenly arranged; the positioning pin (803) includes a positioning screw (804) and a positioning nut (805), the positioning screw (804) is provided as a headed screw and is arranged in the positioning hole (802), and the screw head is arranged above the storage plate (801); the positioning nut (805) is screwed to the positioning screw (804) and is arranged below the storage plate (801).

4. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: A partition is provided in the box body, and the interior of the box body is divided into the equipment room (1) and the gas conditioning room (2) by the partition; one end of the equipment room (1) away from the gas conditioning room (2) is provided with an opening structure communicating with the outside world; An opening and closing door (11) is provided on the side wall of the equipment room (1), a touch screen (10) is installed on the opening and closing door (11), and the touch screen (10) is connected to the central controller (24); The box body is installed with an energy storage box (50), and the top wall of the box body is paved with a solar panel (9); the solar panel (9) is connected to the energy storage box (50), and the solar panel (9) and the energy storage box (50) are respectively connected to the central controller (24).

5. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: Arc transition structures are provided between the internal side walls of the atmosphere conditioning room (2) and at the connections between the side walls and the top wall and bottom wall, and / or are filled with polyurethane, and / or are airtightly treated by gluing non-woven fabric with airtight adhesive; A door frame (5) is provided at one end of the atmosphere-controlled room (2) away from the equipment room (1); polyurethane and airtight adhesive are provided between the door frame (5) and the side wall of the box body for airtight treatment; an airtight door (3) is installed in the door frame (5); a groove is provided on the side of the airtight door (3) adjacent to the door frame (5); an inflatable sealing strip (18) is embedded in the groove; a second pressure sensor (6) is installed in the door frame (5); the second pressure sensor (6) is connected to an inflation and deflation control system, and the inflation and deflation control system is connected to the inflatable sealing strip (18); The airtight door (3) is provided with an observation window (4), and the door frame (5) is installed with an emergency door opening device (7).

6. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: A filter plate (44) is provided below the evaporator (27), and the filter plate (44) is mounted on a drainage trough (38), and the drainage trough (38) is connected to the circulating water tank (39); A drainer (45) is provided below the wet film (42), and the drainer (45) is connected to the circulating water tank (39).

7. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: A water level detector (46) is provided in the circulating water tank (39), and the water level detector (46) is connected to the central controller (24); The circulating water tank (39) is provided with a water inlet pipe (47) and a drainage pipe (48), and the water inlet pipe (47) and the drainage pipe (48) are respectively connected to the central controller (24).

8. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: The circulating water tank (39) and the water distributor (43) are connected via a water pump (49), and a temperature sensor (29) and a first pressure sensor (30) are also provided in the equipment room (1).

9. The controlled atmosphere sterilization and fresh-keeping device according to claim 1, characterized in that: A lighting system is provided in the gas conditioning room (2), and the lighting system includes a lighting lamp (12); the lighting lamp (12) is connected to the central controller (24).

10. The controlled atmosphere sterilization and fresh-keeping device according to any one of claims 1 to 9, characterized in that: A monitoring system is provided in the gas conditioning room (2), and the monitoring system includes a monitor (15); the monitor (15) is connected to the central controller (24).

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